Macro helix::codegen_coercions

macro_rules! codegen_coercions {
    ({
        type: class,
        rust_name: $rust_name:tt,
        ruby_name: $ruby_name:tt,
        meta: { pub: $pub:tt, reopen: $reopen:tt },
        struct: (),
        methods: $methods:tt
    }) => { ... };
    ({
        type: class,
        rust_name: $rust_name:tt,
        ruby_name: $ruby_name:tt,
        meta: { pub: $pub:tt, reopen: false },
        struct: $struct:tt,
        methods: $methods:tt
    }) => { ... };
}